scholarly journals Protective Effect of Peroxisome Proliferator-Activated ReceptorαActivation against Cardiac Ischemia-Reperfusion Injury Is Related to Upregulation of Uncoupling Protein-3

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Jong Wook Song ◽  
Hyo Jung Kim ◽  
Hyelin Lee ◽  
Jae-woo Kim ◽  
Young-Lan Kwak
Keyword(s):  
Ischemia Reperfusion Injury ◽  
Uncoupling Protein ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Peroxisome Proliferator ◽  
Myocardial Infarct Size ◽  
Ros Production ◽  
H9c2 Cells ◽  
Ucp3 Expression ◽  
Hypoxia Reoxygenation

Activation of peroxisome proliferator-activated receptorα(PPARα) confers cardioprotection, while its mechanism remains elusive. We investigated the protective effect of PPARαactivation against cardiac ischemia-reperfusion injury in terms of the expression of uncoupling protein (UCP). Myocardial infarct size and UCP expression were measured in rats treated with WY-14643 20 mg/kg, a PPARαligand, or vehicle. WY-14643 increased UCP3 expressionin vivo. Myocardial infarct size was decreased in the WY-14643 group (76 ± 8% versus 42 ± 12%,P<0.05). During reperfusion, the incidence of arrhythmia was higher in the control group compared with the WY-14643 group (9/10 versus 3/10,P<0.05). H9c2 cells were incubated for 24 h with WY-14643 or vehicle. WY-14643 increased UCP3 expression in H9c2 cells. WY-14643 decreased hypoxia-stimulated ROS production. Cells treated with WY-14643 were more resistant to hypoxia-reoxygenation than the untreated cells. Knocking-down UCP3 by siRNA prevented WY-14643 from attenuating the production of ROS. UCP3 siRNA abolished the effect of WY-14643 on cell viability against hypoxia-reoxygenation. In summary, administration of PPARαagonist WY-14643 mitigated the extent of myocardial infarction and incidence of reperfusion-induced arrhythmia. PPARαactivation conferred cytoprotective effect against hypoxia-reoxygenation. Associated mechanisms involved increased UCP3 expression and resultant attenuation of ROS production.

Pioglitazone protects the myocardium against ischemia-reperfusion injury in eNOS and iNOS knockout mice

2008 ◽  
Vol 295 (6) ◽  
pp. H2436-H2446 ◽  
Author(s):  
Yumei Ye ◽  
Yu Lin ◽  
Saraswathy Manickavasagam ◽  
J. Regino Perez-Polo ◽  
Brian C. Tieu ◽  
...  
Keyword(s):  
Protective Effect ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Coronary Artery Occlusion ◽  
Artery Occlusion ◽  
Peroxisome Proliferator ◽  
Myocardial Infarct Size ◽  
Peroxisome Proliferator Activated Receptor ◽  
Inos Knockout Mice

Endothelial nitric oxide synthase (eNOS) activation with subsequent inducible NOS (iNOS), cytosolic phospholipase A2 (cPLA2), and cyclooxygenase-2 (COX2) activation is essential to statin inhibition of myocardial infarct size (IS). In the rat, the peroxisome proliferator-activated receptor-γ agonist pioglitazone (Pio) limits IS, upregulates and activates cPLA2 and COX2, and increases myocardial 6-keto-PGF1α levels without activating eNOS and iNOS. We asked whether Pio also limits IS in eNOS−/− and iNOS−/− mice. Male C57BL/6 wild-type (WT), eNOS−/−, and iNOS−/− mice received 10 mg·kg−1·day−1 Pio (Pio+) or water alone (Pio−) for 3 days. Mice underwent 30 min coronary artery occlusion and 4 h reperfusion, or hearts were harvested and subjected to ELISA and immunoblotting. As a result, Pio reduced IS in the WT (15.4 ± 1.4% vs. 39.0 ± 1.1%; P < 0.001), as well as in the eNOS−/− (32.0 ± 1.6% vs. 44.2 ± 1.9%; P < 0.001) and iNOS−/− (18.0 ± 1.2% vs. 45.5 ± 2.3%; P < 0.001) mice. The protective effect of Pio in eNOS−/− mice was smaller than in the WT ( P < 0.001) and iNOS−/− ( P < 0.001) mice. Pio increased myocardial Ser633 and Ser1177 phosphorylated eNOS levels in the WT and iNOS−/− mice. iNOS was undetectable in all six groups. Pio increased cPLA2, COX2, and PGI2 synthase levels in the WT, as well as in the eNOS−/− and iNOS−/−, mice. Pio increased the myocardial 6-keto-PGF1α levels and cPLA2 and COX2 activity in the WT, eNOS−/−, and iNOS−/− mice. In conclusion, the myocardial protective effect of Pio is iNOS independent and may be only partially dependent on eNOS. Because eNOS activity decreases with age, diabetes, and advanced atherosclerosis, this effect may be relevant in a clinical setting and should be further characterized.

scholarly journals Effect of eNOS on Ischemic Postconditioning-Induced Autophagy against Ischemia/Reperfusion Injury in Mice

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Jun Shao ◽  
Chen Miao ◽  
Zhi Geng ◽  
Maohong Gu ◽  
Yanhu Wu ◽  
...  
Keyword(s):  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Critical Role ◽  
Ischemic Postconditioning ◽  
Coronary Artery Ligation ◽  
Myocardial Infarct Size ◽  
Protective Effects ◽  
H9c2 Cells

Autophagy is involved in the development of numerous illnesses, including ischemia/reperfusion (I/R). Endothelial nitric oxide synthase (eNOS) participates in the protective effects of ischemic postconditioning (IPostC). However, it remains unclear whether eNOS-mediated autophagy serves as a critical role in IPostC in the hearts of mice, in protecting against I/R injury. In the present study, the hearts of mice with left anterior descending coronary artery ligation were studied as I/R models. H9c2 cells underwent exposure to hypoxia/reoxygenation (H/R) and were examined as in vitro model. IPostC reduced mice myocardial infarct size and improved the structure of the heart. IPostC increased the formation of autophagosomes and increased the phosphorylation of eNOS and adenosine monophosphate-activated protein kinase (AMPK). Autophagy and eNOS inhibition suppressed the cardioprotective effects of IPostC. AMPK or eNOS inhibition abolished the improvement effect of IPostC on autophagy. AMPK inhibition decreased eNOS phosphorylation in the heart. Additionally, H9c2 cells suffering hypoxia were used as in vitro model. Autophagy or eNOS inhibition abolished the protective effects of hypoxic postconditioning (HPostC) against H/R injury. AMPK and eNOS inhibition/knockout decreased autophagic activity in the HPostC group. These results indicated that IPostC protects the heart against I/R injury, partially via promoting AMPK/eNOS-mediated autophagy.

Necrostatin-1 Analog DIMO Exerts Cardioprotective Effect against Ischemia Reperfusion Injury by Suppressing Necroptosis via Autophagic Pathway in Rats

Pharmacology ◽  
2021 ◽  
Vol 106 (3-4) ◽  
pp. 189-201
Author(s):  
Shigang Qiao ◽  
Wen-jie Zhao ◽  
Huan-qiu Li ◽  
Gui-zhen Ao ◽  
Jian-zhong An ◽  
...  
Keyword(s):  
Cell Death ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Glucose Deprivation ◽  
Neonatal Rat ◽  
Ligand Docking ◽  
Autophagic Flux ◽  
Myocardial Infarct Size ◽  
Rat Cardiomyocytes

Aim: It has been reported that necrostatin-1 (Nec-1) is a specific necroptosis inhibitor that could attenuate programmed cell death induced by myocardial ischemia/reperfusion (I/R) injury. This study aimed to observe the effect and mechanism of novel Nec-1 analog (Z)-5-(3,5-dimethoxybenzyl)-2-imine-1-methylimidazolin-4-1 (DIMO) on myocardial I/R injury. Methods: Male SD rats underwent I/R injury with or without different doses of DIMO (1, 2, or 4 mg/kg) treatment. Isolated neonatal rat cardiomyocytes were subjected to oxygen-glucose deprivation/reoxygenation (OGD/R) treatment with or without DIMO (0.1, 1, 10, or 100 μM). Myocardial infarction was measured by TTC staining. Cardiomyocyte injury was assessed by lactate dehydrogenase assay (LDH) and flow cytometry. Receptor-interacting protein 1 kinase (RIP1K) and autophagic markers were detected by co-immunoprecipitation and Western blotting analysis. Molecular docking of DIMO into the ATP binding site of RIP1K was performed using GLIDE. Results: DIMO at doses of 1 or 2 mg/kg improved myocardial infarct size. However, the DIMO 4 mg/kg dose was ineffective. DIMO at the dose of 0.1 μM decreased LDH leakage and the ratio of PI-positive cells followed by OGD/R treatment. I/R or OGD/R increased RIP1K expression and in its interaction with RIP3K, as well as impaired myocardial autophagic flux evidenced by an increase in LC3-II/I ratio, upregulated P62 and Beclin-1, and activated cathepsin B and L. In contrast, DIMO treatment reduced myocardial cell death and reversed the above mentioned changes in RIP1K and autophagic flux caused by I/R and OGD/R. DIMO binds to RIP1K and inhibits RIP1K expression in a homology modeling and ligand docking. Conclusion: DIMO exerts cardioprotection against I/R- or OGD/R-induced injury, and its mechanisms may be associated with the reduction in RIP1K activation and restoration impaired autophagic flux.

Abstract 300: Topical Application of IcyHot Reduces Myocardial Infarct Size in Rodents by a TRPA1-dependent Mechanism

2017 ◽  
Vol 121 (suppl_1) ◽  
Author(s):  
Yun Wu ◽  
Yao Lu ◽  
Eric R Gross
Keyword(s):  
Infarct Size ◽  
Transient Receptor Potential ◽  
Ischemia Reperfusion Injury ◽  
Calcium Influx ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Sprague Dawley ◽  
Area At Risk ◽  
Reactive Aldehydes

Toxic reactive aldehydes are formed during ischemia-reperfusion. The ion channel transient receptor potential ankryin 1 (TRPA1) is irreversibly modified by reactive aldehydes which can cause calcium influx and cell death. Here we tested whether topically applied creams containing a reversible TRPA1 agonist could reduce myocardial infarct size. Male Sprague-Dawley rats 8-10 weeks age were subjected to an in vivo myocardial ischemia-reperfusion model of 30 minutes of left anterior descending (LAD) coronary artery ischemia followed by 2 hours reperfusion. Prior to ischemia, rats were untreated or had 1g of cream applied to the abdomen. The creams tested were IcyHot, Bengay, Tiger Balm, or preparation H (Fig. 1A). Hearts were negatively stained for the area at risk and the infarct size was determined by using TTC staining (Fig. 1B). A subset of rodents prior to receiving IcyHot also received an intravenous bolus of the TRPA1 antagonist TCS-5861528 (1mg/kg) or AP-18 (1mg/kg). Interestingly, both IcyHot and Bengay reduced myocardial infarct size compared to untreated rodents (Fig. 1C and 1D IcyHot: 41±3%*, Bengay: 50±2%* versus control 62±1%, n=6/group, *P<0.001). Both preparation H and Tiger Balm failed to reduce myocardial infarct size (Tiger Balm: 63±2%, preparation H 59±2%). Giving a TRPA1 antagonist prior to IcyHot also blocked the reduction in infarct size. Our additional data also indicates the methyl salicylate (mint) in IcyHot and Bengay is the agent that limits myocardial infarct size. Since IcyHot and Bengay are safely used by humans, targeting TRPA1 by using products such as these could be quickly translatable and widely used to reduce ischemia-reperfusion injury.

scholarly journals The Antioxidant, Anti-Inflammatory and Anti-Apoptotic Activities of the Bauhinia Championii Flavone are Connected with Protection Against Myocardial Ischemia/Reperfusion Injury

2016 ◽  
Vol 38 (4) ◽  
pp. 1365-1375 ◽  
Author(s):  
Jie Jian ◽  
Feifei Xuan ◽  
Feizhang Qin ◽  
Renbin Huang
Keyword(s):  
Myocardial Ischemia ◽  
Caspase 3 ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Enzyme Linked Immunosorbent Assay ◽  
Tunel Staining ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion

Background/Aims: Previous studies have demonstrated that Bauhinia championii flavone (BCF) exhibits anti-oxidative, anti-hypoxic and anti-stress properties. This study was designed to investigate whether BCF has a cardioprotective effect against myocardial ischemia/reperfusion (I/R) injuries in rats and to shed light on its possible mechanism. Methods: The model of I/R was established by ligating the left anterior descending coronary artery for 30 min, then reperfusing for 180 min. Hemodynamic changes were continuously monitored. The content of malondialdehyde (MDA) as well as the lactate dehydrogenase (LDH), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities were assessed. The release of interleukin-6 (IL-6) was measured by enzyme-linked immunosorbent assay (ELISA). Apoptosis of cardiomyocytes was determined by caspase-3 activity and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining. The expression of TLR4, NF-κBp65, Bcl-2 and Bax were detected by western blotting. Results: Pretreatment with BCF significantly reduced the serum levels of LDH, MDA and IL-6, but increased the activities of SOD and GSH-Px. It also attenuated myocardial infarct size, reduced the apoptosis rate and preserved cardiac function. Furthermore, BCF inhibited caspase-3 activity and the expression of TLR4, phosphorylated NF-κBp65 and Bax, but enhanced the expression of Bcl-2. Conclusion: These results provide substantial evidence that BCF exerts a protective effect on myocardial I/R injury, which may be attributed to attenuating lipid peroxidation, the inflammatory response and apoptosis.

Abstract 10246: Hydroxychloroquine Pretreatment Reduces Myocardial Ischemia-Reperfusion Injury: Role of Cardiac Extracellular-Signal-Regulated Kinase 5 and Autophagy

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Feiyan Yang ◽  
Chang Yin ◽  
Lei Xi ◽  
Rakesh C Kukreja
Keyword(s):  
Infarct Size ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Beclin 1 ◽  
Myocardial Infarct Size ◽  
Western Blots ◽  
Extracellular Signal Regulated Kinase ◽  
Extracellular Signal ◽  
Related Proteins

Background: Hydroxychloroquine (HCQ) is an antimalarial drug, which is also widely used to treat chronic rheumatologic diseases. Since HCQ was reported to inhibit cell autophagy and to activate extracellular-signal-regulated kinase 5 (ERK5) in vascular endothelial cells, we designed the current study to determine the effects of HCQ on cardiac ischemia-reperfusion (I-R) injury and post-I-R expression of ERK5 and autophagy marker proteins. Methods: Adult C57BL/6J mice of both genders were pretreated with HCQ (50 mg/kg, i.p.) 1 hour prior to isolation of the hearts, which were subjected to 30 min of no-flow global ischemia followed by 60 min of reperfusion in Langendorff mode. Ventricular function was continuously assessed and myocardial infarct size was determined at the end of I-R. Heart samples were collected following normoxic perfusion (no-ischemic controls), I-R, or I-R with HCQ for assessing ERK5 and autophagy-related proteins with Western blots. Results: HCQ pretreatment reduced infarct size significantly in the female hearts (P<0.05) as compared with the male hearts (Fig. A). Post-I-R cardiac function was better in HCQ-treated males (Fig. B). I-R resulted in a robust increase in total ERK5 (Fig. C) and phosphorylated ERK5 (Thr218/Tyr220) in both genders, which was abolished in HCQ-treated groups. Conversely, either I-R or HCQ did not affect the post-I-R cardiac expression of autophagy-related proteins (e.g., Atg5, Beclin-1, LC3II/LC3I ratio), except Beclin-1 phosphorylation was inhibited in HCQ-treated male hearts, but not females (Fig. D). Conclusions: Acute HCQ pretreatment affords cardioprotection against I-R injury in both genders. Interestingly, cardioprotective effects of HCQ are associated with a strong inhibitory effect on the induction of ERK5 following I-R in the heart, indicating a novel molecular mechanism underlying the HCQ-induced cardioprotection. However, the cardioprotective dose of HCQ has no major impact on cardiac autophagy.

Abstract 16381: Novel Thiol-activated H2S Donors Attenuate Myocardial Ischemia/Reperfusion Injury

Circulation ◽  
2015 ◽  
Vol 132 (suppl_3) ◽  
Author(s):  
Chelsea Organ ◽  
Zhen Li ◽  
Yu Zhao ◽  
Chuntao Yang ◽  
Shashi Bhushan ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Sustained Release ◽  
Murine Model ◽  
Troponin I ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Myocardial Infarct Size ◽  
Myocardial Ischemia Reperfusion

Background: Hydrogen sulfide (H2S) protects against acute myocardial ischemia/reperfusion (MI/R) injury and heart failure by ameliorating oxidative stress, improving mitochondrial function, and attenuating apoptosis. One of the major limitations of currently available H2S donors is poor pharmacokinetics profiles that result in very rapid and uncontrolled H2S release. NSHD-1 and NSHD-2 are recently developed thiol-activated H2S donors designed for sustained release of H2S upon activation by molecules containing thiol groups such as cysteine and glutathione. We hypothesized that these novel H2S donors would generate H2S for extended periods and ameliorate myocardial cell death following MI/R in an in vivo murine model. Methods and Results: C57BL6/J male mice (10-12 weeks of age) were subjected to 45 minutes of MI followed by 24 hours of R. At the time of reperfusion, animals received Vehicle (0.5% THF), NSHD-1 (50 μg/kg and 100 μg/kg), or NSHD-2 (50 μg/kg) by direct intracardiac (i.c.) injection. In addition, at 4 hours of R, plasma was collected for troponin-I measurements. In preliminary studies we observed sustained release of H2S with both of these H2S donors. Myocardial infarct size was reduced by 35% (p < 0.01 vs. Vehicle) in mice treated with NSHD-1 (100 μg/kg), 43% (p < 0.05 vs. Vehicle) in mice treated with NSHD-2 (50 μg/kg), and 54% (p < 0.01 vs. Vehicle) in mice treated with NSHD-2 (100 μg/kg). Conclusions: NSHD-1 and NSHD-2 significantly attenuate MI/R injury in a murine model. Experiments are currently underway to further define the in vivo pharmacokinetics of H2S release from these agents, mechanisms of action, and safety profile.

Bioinspired cell-derived nanovesicles protect the heart from ischemia reperfusion injury

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
J Wang ◽  
C.Y Huang ◽  
Y.R Neupane ◽  
X Wang ◽  
O Zharkova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Cell Apoptosis ◽  
Imaging System ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Cost Effective ◽  
Public Institution ◽  
Funding Source ◽  
Myocardial Infarct Size

Abstract Introduction Exosomes have been proven to alleviate myocardial ischemia reperfusion (I/R) injury in preclinical studies. However, the laborious and low-yield production process of naturally secreted exosomes has been impeding their translation into clinical trials. Purpose We aim to develop a simple and cost-effective protocol to produce exosome mimetics, bioinspired Cell-Derived Nanovesicles (CDNs), and examine their intrinsic bioactivity in a mouse model of I/R injury. Methods CDNs were produced from human U937 monocytes using cell shearing approach and characterized by dynamic light scattering (DLS), nanoparticle tracking analysis (NTA) and transmission electron microscopy (TEM). Lipid composition of cells and CDNs was analysed by lipidomics. I/R injury was induced by transient occlusion of left coronary artery. Data was analysed with Mann-Whitney U test. P&lt;0.05 was considered statically significant. Results We obtained 538 mg (protein content) of CDNs, or 3x109 CDNs, via cell shearing approach from 2×107 cells, approximately 15 folds of exosomes via natural secretion from the same number of cells. CDNs were 125±8 nm in diameter with negative surface charge (zeta potential −7.0±0.8) and presented as double-membranous vesicles under TEM. In vitro, CDNs showed strong antioxidant activity and could be taken up by bone marrow-derived macrophages. Following intravenous administration, as demonstrated by the IVIS Spectrum imaging system, CDNs accumulated specifically in the infarct area of the heart within 3 hours. Compared with saline treatment, CDNs reduced myocardial infarct size by 31.6% (p&lt;0.01) after 24 hours of I/R injury. Intriguingly, CDNs generated from human mesenchymal stem cells showed similar therapeutic efficacy. Mechanistically, CDNs inhibited infiltration of inflammatory cells (macrophages) and promoted upregulation of the anti-inflammatory cytokine interleukin 10 (IL10) in the I/R injured hearts. In the blood stream, CDNs increased IL10 protein level and exerted antioxidant activity. Furthermore, CDNs reduced I/R injury-induced cell apoptosis in the myocardium. Conclusion We have established a cost-effective approach to produce exosome mimetics, bioinspired CDNs, which protect the heart from I/R injury via inhibition of inflammation, oxidative stress and cardiac cell apoptosis. CDNs have intrinsic cardioprotective capability in heart injury, comparable to exosomes. Funding Acknowledgement Type of funding source: Public Institution(s). Main funding source(s): National University Health System.

scholarly journals Daucosterol pretreatment ameliorates myocardial ischemia reperfusion injury via ROS-mediated NLRP3 inflammasome activation

2020 ◽  
Vol 19 (5) ◽  
pp. 1031-1036
Author(s):  
Guixiang Zhao ◽  
Xiaoyun Ma ◽  
Juledezi Hailati ◽  
Zhen Bao ◽  
Maerjiaen Bakeyi ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Nlrp3 Inflammasome ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Infarct ◽  
Ischemia Reperfusion ◽  
Inflammasome Activation ◽  
Myocardial Infarct Size ◽  
Nlrp3 Inflammasome Activation ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Myocardial Ischemia Reperfusion

Purpose: To determine the involvement of NLRP3 signaling pathway in the preventive role of daucosterol in acute myocardial infarction (AMI).Methods: H9C2 cells were pretreated with daucosterol before hypoxia/reoxygenation (HR) injury. Myocardial ischemia reperfusion (IR) was established in male SD rats, followed by reperfusion. Myocardial infarct size was measured. The serum levels of creatine kinase (CK), lactate  dehydrogenase (LDH), total superoxide dismutase (T-SOD), and malondialdehyde (MDA) were determined using commercial kits. NLRP3 inflammasome activation was assessed by western blotting.Results: Myocardial infarct size was smaller after IR injury in rats pretreated with daucosterol (10 and 50 mg/kg) than that pretreated with daucosterol (0 and 1 mg/kg). The increase in LDH, CK, and MDA levels after IR injury was reduced following daucosterol pretreatment. Reactive oxygen species (ROS) production increased, whereas T-SOD activity decreased after IR injury. These changes were prevented by pretreatment of daucosterol (10 and 50 mg/kg). Protein expression of NLRP3 inflammasome increased after IR injury in H9C2 cells while pretreatment with daucosterol inhibited the upregulation of NLRP3 inflammasome.Conclusion: The cardioprotective effect of daucosterol pretreatment appears to be mediated via the inactivation of ROS-related NLRP3 inflammasome, suggesting that daucosteol might be a potential therapeutic drug for AMI. Keywords: Daucosterol, Myocardial ischemia, Reperfusion injury, Reactive oxygen species, NLRP3 inflammasome

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